Which of the following statements is incorrect regarding an evolutionary trend?
1. | It is the continuous change of a character within an evolving lineage. |
2. | The number of trends in any lineage is the same as the number of characters evolving. |
3. | A trend may be progressive or retrogressive. |
4. | Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations. |
Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype
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Given below is the representative evolutionary history of vertebrates through geological periods. A, B, C, and D, respectively, are:
1. | Dinosaurs, Thecodonts, Therapsids, and Pelycousurs |
2. | Dinosaurs, Therapsids, Thecodonts, and Pelycosaurs |
3. | Pelycosaurs, Therapsids, Thecodonts, and Dinosaurs |
4. | Theraosids, Dinosaurs, Pelycosaurs, and Thecodonts |
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The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:
1. | one organism has given rise to another |
2. | they share a common ancestor |
3. | they perform the same function |
4. | they have biochemical similarities |
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1. | Darwin did not believe in the inheritance of acquired traits while Hugo de Vries did. |
2. | Evolution for Darwin was gradual while Hugo de Vries believed mutation caused speciation. |
3. | Evolution for Darwin was a stochastic process and for Hugo de Vries was a determinist process. |
4. | Fitness for Darwin was reproductive fitness and for Hugo de Vries was physical fitness. |